Security is tight at Old Trafford today for the high-profile clash between Manchester United and Liverpool, in the wake of a series of anti-terror raids.

Greater Manchester Police, which has refused to comment on speculation the grounds were a possible terror target, said there would be more checks and random searches to reassure fans.

Manchester United has said it was not aware of any impending threat despite newspaper reports suggesting that ten terror suspects arrested on Monday all had tickets for the game, raising the possibility of mass suicide bombings.

Police were urging fans to arrive well ahead of the 3pm kick-off, bring minimal baggage and remain vigilant outside and inside the grounds.

Ten people, of North African and Iraqi Kurdish origin, are still being held.